問題描述

我正在嘗試將 Woocommerce 中的添加到購物車"按鈕上的功能設置為只允許將特定產品添加到購物車一次.

I am trying to set the functionality in Woocommerce on the Add to Cart button to only allow a particular product to be added once to the Cart.

第一次將特定產品添加到購物車后，需要隱藏添加到購物車.

Once a particular product has been added to cart the first time, the Add to Cart needs to be hidden.

在購物車中，我可以有任意數量的產品 - 每個產品最多只能有 1 個.

In the cart I can have any number of products - just a max of quantity 1 for each product.

我在做研究，發現我可以使用 woocommerce_add_to_cart_validation 鉤子.但不知道如何開始.

I was doing research and saw that I can use woocommerce_add_to_cart_validation hook. But have no idea how to start off.

如何允許將特定產品添加到購物車一次?

How can I allow a particular product to be added once to the Cart?

推薦答案

如果產品在購物車中，則使用 woocommerce_is_purchasable 鉤子禁用添加到購物車按鈕:

Disable add to cart button if product is in cart using woocommerce_is_purchasable hook:

add_filter( 'woocommerce_is_purchasable', 'disable_add_to_cart_if_product_is_in_cart', 10, 2 );
function disable_add_to_cart_if_product_is_in_cart ( $is_purchasable, $product ){
    // Loop through cart items checking if the product is already in cart
    foreach ( WC()->cart->get_cart() as $cart_item ){
        if( $cart_item['data']->get_id() == $product->get_id() ) {
            return false;
        }
    }
    return $is_purchasable;
}

代碼位于活動子主題(或活動主題)的 function.php 文件中.經測試且有效(即使對于可變產品中的產品變體).

Code goes in function.php file of your active child theme (or active theme). Tested and works (even for product variations in variable products).

原答案:這是一個使用 woocommerce_add_to_cart_validation 鉤子的示例，它可以解決問題(防止添加到購物車操作并在需要時顯示自定義通知)，并使用自定義實用程序功能刪除您特定定義的數量字段產品編號:

Original answer: Here is an example using woocommerce_add_to_cart_validation hook and that will do the trick (preventing add to cart action and displaying a custom notice when needed), and using a custom utility function that will remove quantity field for your specific defined product ID:

add_filter( 'woocommerce_add_to_cart_validation', 'limit_cart_items_from_category', 10, 3 );
function limit_cart_items_from_category ( $passed, $product_id, $quantity ){
    // HERE define your product ID
    $targeted_product_id = 37;

    // Check quantity and display notice
    if( $quantity > 1 && $targeted_product_id == $product_id ){
        wc_add_notice( __('Only one item quantity allowed for this product', 'woocommerce' ), 'error' );
        return false;
    }

    // Loop through cart items checking if the product is already in cart
    foreach ( WC()->cart->get_cart() as $cart_item ){
        if( $targeted_product_id == $product_id && $cart_item['data']->get_id() == $targeted_product_id ) {
            wc_add_notice( __('This product is already in cart (only one item is allowed).', 'woocommerce' ), 'error' );
            return false;
        }
    }
    return $passed;
}

// Checking and removing quantity field for a specific product 
add_filter( 'woocommerce_quantity_input_args', 'custom_quantity_input_args', 10, 2 );
function custom_quantity_input_args( $args, $product ) {
    // HERE define your product ID
    $targeted_product_id = 37;

    if( $targeted_product_id == $product->get_id() )
        $args['min_value'] = $args['max_value'] = $args['input_value'] = 1;

    return $args;
}

代碼位于活動子主題(或活動主題)的 function.php 文件中.經測試有效.

Code goes in function.php file of your active child theme (or active theme). Tested and works.

這篇關于如果產品已在購物車中，請禁用 Woocommerce 添加到購物車按鈕的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！